John Metzler, who ran Arlington National Cemetery for 19 years, said he accepts "full responsibility" for serious problems. Under hostile questioning from senators, Metzler acknowledged he had been aware of problems for years with unmarked and mismarked graves and mishandled remains. The Senate Homeland Security subcommittee hearing took place on Thursday, July 29, 2010 on Capitol Hill in Washington, DC. (Photo by Jeff Malet)